And walter ii



(No Model.)

J. H. HOADLEYXu W. H. KNIGHT.

STOP VALVE.

No. 586,235. Patented July 13, 1897.

INVENTOZ;

WITNESSES:

ATTORNEYS in: mums m an. mom-(mo. wlwvm. ac.

UNITED STATES PATENT OFFICE.

JOSEPH H. IIOADLEY, OF NEIV YORK, AND IVALTER II. KNIGHT, OF NEW BRIGHTON, NEIV YORK.

STOP-VALVE.

SPECIFICATION forming part of Letters Patent No. 586,235, dated July 13, 1897.

Application filed July 27,1896. Serial No. 600,592. No model.)

To all whom it may concern: sure passage leading from reducingvalve to Be it known that we, JOSEPH H. HOAD- thehot-waterheater X. The hot-waterheater LEY, residing in New York city and county, X is of usual construction, comprising a Waand \VALTER H. KNIGHT, residing in New ter-tankwith the inlet-pipe Fextending into 55 Brighton, Richmond county, State of New it and dipping beneath the water, the outlet- York, citizens of the United States, have inpipe F leading from it above the surface of ventedanewand usefullmprovementin Stopthe water, and a gas, oil, or other suitable Valves, 'of which the following is a specificaheater supported beneath for keepingit proption. erly heated. 6o 10 Our invention relates to the stop-valve to F is a fluid-pipe leading from heater X to be used in connection with fluid-pressure enthe engine throttle-valve G. gines deriving their power from a source of H is a passage from the fluid-pressure chest fluid-pressure under a high state of compres- L of the engine M to the cylinder I, inwhich sion. IVith such engines a reducing-valve there travels a piston J, connected to the stop- 65 z 5 is used between the source of high pressure valve B. (The engine is shown merely diaand the engine to reduce the original pressure grammatically and at reduced scale.) down to such apressure as the engine is adapt- K is a spring for forcing the stop-valve to ed to use. Such reducing-valves being autoits seat when the throttle-valve G is closed matic, and consequently more or less delicate and the pressure is released from passage H 70 and sensitive, are liable at times to leak when through the exhaust of the engine. The

they are supposed to be closed, thus entailheater X supplies pressure for opening the ing a loss of the fluid under pressure. It is high-pressure stop-valve and also heats the generally found necessary to protect such compressed air on its way to the engine-cylvalves by a positive stop-valve located beinder. tween the reducing-valve and the source of It will be seen that when the throttle-valve pressure and closed by hand When the-engine G is opened and fluid-pressure in the form of is shut down. steam is admitted to the fluid-pressure chest In our invention we provide a stop-valve L from heater X, (a slight steam-pressure bewhich is held closed by the high pressure and ing constantly maintained in the heater by 80 o opened by the low pressure which is admitted its constantly-burning fiame',) the pressure, to it from a hot-water heater when the throtacting through passage H and chamberI and tie-valve of the engine is opened, so that when coming against the large surface of piston J, the engine is running the stop-valve will be will force the stop-valve B open against the opened and held open as long as the engine high pressure, which tends always to hold it 8 5 5 is working, and when the engine is stopped by to its seat, and also against the tension of the the closing of the throttle-valve the stop-valve spring K. As long as the engine is working, will automatically close, because of the shutor, rather, as long as the throttle -valve is ing off of the low pressure. To aid in this open, this stop-valve B will also remain open; self-closing, we apply a spring to the stopbut as soon as the throttle-valve is closed and 90 40 valve, acting in the same direction as the the pressure disappears from chest L the high pressure. spring, acting together with the pressure of In the accompanying drawings, Figure 1 the high-pressure fluid, will force the stoprepresents in section an apparatus embodyvalve B to its seat, forming a positive check ing our invention, and Fig. 2 is a similar sec .to the escape of anyof the high-pressure fluid, o 5 tional View of a modified form of the valve. even though the reducingvalve E may be A is a pipe leading from the high-pressure leaking.

reservoir. The stop-valve may be made balanced, as B is a stop-valve located in valve-chamshown in Fig. 2, so that thespring alone Will her 0. hold it to its seat, or the two parts I) b of the 100 D is a passage from the stop-Valve chambalanced valve may be of slightly-different her to reducing-valve E, and F is a low-presareas, I) being the larger, so as to aid the springin holding the valve to its seat by just the desired amount of pressure.

Having thus described our invention, the following is what we claim as new therein and desire to secure by Letters Patent:

1. In combination with a source of high pressure, a reducing-valve for lowering the pressure to an apparatus for utilizing the lower pressure, a throttle-valve for controlling the admission of such lowered pressure to the apparatus, and an autom atically-closed stop-valve operated by the lowered pressure, when the throttle-valve is opened, to open the passage between the source of high pressure and the reducing-valve, said stop-valve being automatically closed when the said throttlevalve is closed, substantially as set forth.

2. In combination with a consumer of fluidpressure, such as a fluid-pressure engine, a valve for admitting and shuttingoft the fluidpressure to said engine, a source of high pressure, a reducing-valve for reducing such high pressure, an automatic stop-valve located between the source of high pressure and the re ducing-valve,said stop-valve being closed and held closed by the high-pressure fluid, and means for automatically opening said stopvalve by the reduced fluid-pressure when the throttle-Valve is opened, substantially as set forth.

3. In combination with a consumer of fluidpressure, such as a fluid-pressure engine, a throttle-valve for admitting or shutting off fluid-pressure to the engine, a source of high pressure, the reducingvalve, a hot-water heater located between the reducing-valve and throttle-valve, a stop-valve between the hi gh-pressure supply and red ueing-valve, and means operated by fluid-pressure for autonatically opening the st0p-valve when the throttle-valve is opened, as set forth.

4:. In combination with a source of high pressure, an apparatus for utilizing low pressure, a reducing-valve for lowering the pressure to said apparatus, a throttle-valve for controlling the admission of the low pressure to said apparatus, a hot-water heater located between the reducing valve and throttlevalve, a stop-valve between the high-pressure supply and reducing-valve, and a fluid-pres sure-operated device connected with said stopvalve and communicating with the low-pressure supply between the throttle-valve and apparatus being operated, substantially as set forth.

, 5. In combination with a source of high. pressure, the stop-valve B, reducing-valve E,

throttle-valve G, a low-pressure-supply pipe controlled by the throttle-valve, the passage H, extending from the low-pressure-supply pipe, and a piston J in said passage I-I operatively connected with the stop-valve B, subhot-water heater, a passage leading from the hot-water heater to an apparatus to be run by the lowered pressure, a throttle-valve in said low-pressure passage, a passage H leading from the low-pressure-supply pipe, a stopvalve in the high-pressure passage between the source of high pressure and reducingvalve, and a piston movably supported in passage 1 and connected with the stop-valve and adapted to operate it. 7 V

8. The combination of a source of high pressure, a reducing-valve, a hot-water heater, a passage leading from the source of high pressure through the reducing-valve to the hot-water heater, a stop-valve in said passage between the source and reducing-valve, a

spring for closing said stop-valve, a low-pressure-supply pipe leading from the hot-water heater, a throttle-valve in the low-pressuresupply pipe, a fluid-pressLire-operated device in communication with the low-pressure-supply pipe and connected with the stop-valve and adapted to force it open against the action of its spring.

JOSEPH H. HOADLEY. \VALTER I-I. KNIGHT. \Vitnesses:

M. V. BIDGOOD, HARRY E. KNIGHT. 

